Fill a medium saucepan with water and add the white vinegar; bring to a gentle simmer over medium heat.
In a small heat-proof bowl, whisk the egg yolk, Greek yogurt, lemon juice, and melted ghee until smooth.
Place the bowl over a pot of simmering water to create a double boiler and whisk constantly for 2-3 minutes until the sauce is thickened and velvety, then season with sea salt and cayenne.
In a dry skillet over medium-high heat, sear the Canadian bacon slices for 1-2 minutes per side until lightly browned and heated through.
Toast the English muffin half until golden and crisp.
Crack the two whole eggs into individual small ramekins, then gently slide them into the simmering vinegar water.
Poach the eggs for 3 minutes until the whites are set but the yolks remain runny, then remove with a slotted spoon and drain on a paper towel.
Place the toasted muffin on a plate, top with the seared Canadian bacon, followed by the poached eggs.
Drizzle the warm hollandaise sauce over the eggs and garnish with black pepper and fresh minced chives.